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请问,ULN2803输入高电平导通,还是低电平导通,若是高电平导通 输入是3.3vTTL电平是否可以的导通,谢谢
达林顿管就是将多个晶体管的集电极连一起,如果导通,就输出低电平,如果管子未导通就输出高电平,ULV2803的输入电压范围为0~5V,所以3.3V 没问题。